định luật jun-len-xơ.công thức.giải thích

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#𝐧𝐠𝐭𝐡𝐢𝐭𝐫𝐚𝐚𝐦𝐲𝟏𝟔𝟓𝟔 𝐍𝐡𝐢𝐞̣̂𝐭 𝐥𝐮̛𝐨̛̣𝐧𝐠 𝐭𝐨̉𝐚 𝐫𝐚 𝐨̛̉ 𝐝𝐚̂𝐲 𝐝𝐚̂̃𝐧 𝐤𝐡𝐢 𝐜𝐨́ 𝐝𝐨̀𝐧𝐠 đ𝐢𝐞̣̂𝐧 𝐜𝐡𝐚̣𝐲 𝐪𝐮𝐚 𝐭𝐢̉ 𝐥𝐞̣̂ 𝐭𝐡𝐮𝐚̣̂𝐧 𝐯𝐨̛́𝐢 𝐛𝐢̀𝐧𝐡 𝐩𝐡𝐮̛𝐨̛𝐧𝐠 𝐜𝐮̛𝐨̛̀𝐧𝐠 đ𝐨̣̂ 𝐝𝐨̀𝐧𝐠 đ𝐢𝐞̣̂𝐧, 𝐯𝐨̛́𝐢 đ𝐢𝐞̣̂𝐧 𝐭𝐫𝐨̛̉ 𝐜𝐮̉𝐚 𝐝𝐚̂𝐲 𝐝𝐚̂̃𝐧 𝐯𝐚̀ 𝐭𝐡𝐨̛̀𝐢 𝐠𝐢𝐚𝐧 𝐝𝐨̀𝐧𝐠 đ𝐢𝐞̣̂𝐧 𝐜𝐡𝐚̣𝐲 𝐪𝐮𝐚. - 𝐇𝐞̣̂ 𝐭𝐡𝐮̛́𝐜 𝐜𝐮̉𝐚 đ𝐢̣𝐧𝐡 𝐥𝐮𝐚̣̂𝐭: 𝐐 = 𝐈^𝟐.𝐑.𝐭 𝐓𝐫𝐨𝐧𝐠 đ𝐨́: 𝐐: 𝐧𝐡𝐢𝐞̣̂𝐭 𝐥𝐮̛𝐨̛̣𝐧𝐠 𝐭𝐨̉𝐚 𝐫𝐚 𝐭𝐮̛̀ 𝐯𝐚̣̂𝐭 𝐝𝐚̂̃𝐧 (𝐉) 𝐑: đ𝐢𝐞̣̂𝐧 𝐭𝐫𝐨̛̉ 𝐜𝐮̉𝐚 𝐯𝐚̣̂𝐭 𝐝𝐚̂̃𝐧 ( Ω ) 𝐈: 𝐜𝐮̛𝐨̛̀𝐧𝐠 đ𝐨̣̂ 𝐝𝐨̀𝐧𝐠 đ𝐢𝐞̣̂𝐧 𝐜𝐡𝐚̣𝐲 𝐪𝐮𝐚 𝐯𝐚̣̂𝐭 𝐝𝐚̂̃𝐧 (𝐀) 𝐭: 𝐭𝐡𝐨̛̀𝐢 𝐠𝐢𝐚𝐧 𝐝𝐨̀𝐧𝐠 đ𝐢𝐞̣̂𝐧 𝐜𝐡𝐚̣𝐲 𝐪𝐮𝐚 𝐯𝐚̣̂𝐭 𝐝𝐚̂̃𝐧 (𝐬)

Định luật jun-len-xơ:

  Nhiệt lượng tỏa ra ở dây dẫn khi có dòng điện chạy qua tỉ lệ thuận với bình phương cường độ dòng điện, với điện trở của dây dẫn và thời gian dòng điện chạy qua.

Công thức định luật jun-len-xơ:

Q= I2.R.t

Trong đó: R là điện trở của vật dẫn (Ω)

    I là cường độ dòng điện chạy qua vật dẫn (A)

    t là thời gian dòng điện chạy qua vật dẫn (s)

    Q là nhiệt lượng tỏa ra từ vật dẫn (J)

Câu hỏi trong lớp Xem thêm

Làm ơn giúp mik ạ I.Choose the word which has underlined part is pronounced differently from the others. 1. A. chores B. dishes C. houses D. coaches 2. A. laughed B. stamped C. booked D. connected 3. A. lively B. style C. poetry D. symbol 4. A. about B. found C. bought D. south 5. A. teacher B. scholarship C. chair D. chess II. Circle the best option ( A, B, C or D) to complete each sentence 1. I don’t have a car. I wish I ________one. A. have B. didn’t have C. had D. wouldn’t have 2. Many students enjoy ________videogames. A. to watch B. watching C. watch D. to watching 3. The church _________ about 100 years ago. A. was built B. is built C. has been built D. will be built 4. He can’t get home______he has a ticket. A. if B. until C. unless D. without 5. It’s so hot . Why don’t we go swimming ? ________ A. Yes, we do B. No, we don’t C. That’s a good idea. D. Yes, thanks 6. He asked her __________ A. when she leaves the party. B. when did she leave the party. C. when does she leave the party. D. when she left the party 7. The journey to the village is very _______________ A. interested B. interesting C. uninterested D. interest 8. We should follow the traffic rules strictly, ________ ? A. shouldn’t we B. don’t we C. should we . D. should not we 9. The woman _______ lives next door is both my neighbor and a colleague of mine. A. which B. where C. whom D. who 10. He is tired ________ he stayed up late watching TV. A. so B. because C. but D. and III. Choose the words or phrases that are not correct in Standard English and correct the mistakes. 1. Every student in my class are good at English. -> ……………. 2. He studied very hard, so he passed the exam easy. -> ……………. 3. He said that he has done his homework since 7 o'clock. -> ……………. 4. The boy which was given the first prize in the contest was very happy. -> ……………. 5. Despite my father is old, he still goes to work. -> ……………. IV. Give the correct form of the verbs: 1. We (not see)......................Nga since Monday. 2. Do you mind(tell)....................me her address? 3. The letter I (receive)......................yesterday is on the desk. 4. A new bridge (build)...........................in my village next month. 5. I (learn).......................French at the moment,but I have not spoken it very well yet.

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